#include <stdio.h>
int main ()
{
	int year;
	printf("please enter a year: \n");
	scanf("%d",&year);
	if((year%4==0)&&(year%100==!0)||(year%400==0))
	{
		printf("%d is a leap year \n",year);
		
	}
	else 
	{
		printf("%d isn't a leap year.\n",year);
		 
	}
		return 0;
	
 } 
